KR19980058840A - Editing method of erasing rewritable optical disc system - Google Patents

Abstract

The present invention relates to an editing method using an erasure rewritable optical disc system having a memory capable of recording data on an optical disc, erasing or reproducing the recorded data, and storing the reproduced data. After erasing the information on the portion, storing the section information on the data-free erased and non-signaled sections and the section information on the data sections where the data is not erased; A second step of setting, after the first step, the first non-signal section among the no-signal sections as the edit-no signal section, and setting the data section following the set no-signal section as the edit data section; A third step of comparing the amount (N) of data to be recorded in the non-editing section with the data amount (L) of the edited data section and the storage capacity (M) of the memory; As a result of the comparison in the third step, if the data amount L of the edit data section is smaller than the data amount N to be recorded in the edit-free signal section and the storage capacity M of the memory, the data of the edit data section A fourth step of moving to the second step after recording a whole in the edit-free signal period; The data amount L of the edit data section is smaller than the data amount N to be recorded in the edit-free signal section and is larger than the storage capacity M of the memory, or the data amount L of the edit data section is The amount N of data to be recorded in the non-editing section and the storage capacity M of the memory 210 are larger, and the amount N of data to be recorded in the non-editing section is the storage capacity M of the memory 210. If larger, the fifth step of moving to the second step after recording only the data corresponding to the capacity of the memory of the data of the edit data section to the edit-free signal section; The data amount L of the edit data section is smaller than the data amount N to be recorded in the edit-free signal section, is larger than the storage capacity M of the memory, or the data amount L of the edit data section. The amount of data (N) to be recorded in the non-editing section and the storage capacity (M) of the memory is larger than the amount of data (N) to be recorded in the non-editing section and the storage capacity (M) of the memory. And a sixth step of moving the second data to the second non-editing section and recording data corresponding to the amount of data to be recorded in the non-editing section of the edit data section. It is characterized by.

Description

Editing method of erasing rewritable optical disc system

In the erasing rewritable optical disc system, in particular, after erasing an unnecessary portion of the information data recorded on the disc, the present invention relates to an editing method for automatically recording the remaining information data sequentially to the front part.

In general, optical discs are CD-only CDs, CD-ROMs, video discs, etc., which can be read only by the user. Information can be recorded once, and the recorded information can be read several times, but cannot be erased or rewritten. It can be divided into a recording type and an erased rewrite type that can repeatedly record, erase, and reproduce information.

Play-only type CD is already replacing the existing LP record board in the sound industry, CD-ROM which is a medium that can be searched when necessary by recording a large amount of information that needs to be widely spread such as encyclopedia, and recently in Korea Video discs and the like, which are rapidly expanding, have already been put into practical use and are in the dissemination stage. Additional recordable optical discs can be used for hospitals and large documents that need to store information such as X-rays, NMR-CTs, ultrasound tomography, and patient care cards. It is used for necessary public offices and mineral veins such as mines and oil fields.

The erasing rewritable optical disc has a magneto-optical type and a phase change type. The phase change type uses a high level laser beam to heat a minute portion of a crystalline medium to record data, and a low level laser beam to produce crystalline / amorphous crystals. The method of reading information by reflectance difference is used.

In addition, erasing is performed by scanning the laser beam at a lower level than in recording and at a higher level than in reproducing to restore the amorphous portion back to crystalline.

A detailed configuration diagram of such a dual erase rewritable optical disc system is shown in FIG.

In FIG. 1, video and audio data (hereinafter referred to as user data) strings are input to an MPEG (Motion Picture Expert Group) encoder 100 through an audio / video input terminal. The MPEG encoder 100 compresses the input user data stream based on the MPEG compression method and provides the CD-formatter 110 to the CD-formatter 110. The CD-formatter 110 is controlled by the system controller 150. After dividing the compressed user data into bytes, the header and synchronous data, the error detection code (EDC) data for error detection, and the ECC (error correction) Error correction code data is added to form a sector, and then provided to the digital signal processor 120. The digital signal processor 120 performs scrambling, interliving, and EFM modulation on a sector-based data sequence provided from the CD-formatter 110 and provides the amplification unit 130 with scrambling, interleaving, and EFM modulation. The amplifier 130 amplifies the input data and provides it to the optical pickup unit 140. The system controller 150 controls the servo unit 160 to switch the optical pickup unit 140 to the recording mode. The optical pickup unit 140 writes data provided from the amplifier 130 to the disk K under the control of the servo unit 160.

On the other hand, during playback, the system controller 150 controls the servo unit 160 to switch the optical pickup unit 140 to the playback mode. When the optical pickup unit 140 is switched to the reproduction mode, the optical pickup unit 140 reads out the data contained in the disk K and provides it to the amplifier 130. The amplifying unit 130 amplifies the read data and provides the digital signal to the digital signal processing unit 120. The digital signal processing unit 120 performs EFM demodulation, deinterliving, and de-interpolation of the data input from the amplifying unit 130. The scrambling is performed and provided to the CD-ROM decoder 170, and the sub data including time information is detected and provided to the system controller 150. The CD-ROM decoder 170 receives data in sector units from the digital signal processor 120 under the control of the system controller 150 to remove header and sink data, detects an error using EDC data, and detects ECC data. After performing the error correction using the to provide to the MPEG decoder (180).

The MPEG decoder 180 decompresses input user data and outputs it through an audio / video output terminal.

In the erasing rewritable optical disc system operating as described above, when unnecessary information data among the information data recorded on the optical disc is erased, there is no information in the erased section, and the data that is not erased remains dispersed. In this case, therefore, the remaining information data cannot be reproduced continuously.

Accordingly, an object of the present invention is to provide an editing method in which the remaining information data is automatically moved to the front part and recorded sequentially after the unnecessary parts of the information data recorded on the disc are erased.

The present invention provides an editing method using an erasable rewritable optical disc system having a memory capable of recording data on an optical disc, erasing or reproducing the recorded data, and storing the reproduced data. A first step of erasing information on an undesired portion of the data of the optical disc, and storing section information on non-signal sections without data being erased and section information on data sections remaining without data being erased; ; A second step of setting, after the first step, the first non-signal section among the no-signal sections as the edit-no signal section, and setting the data section following the set no-signal section as the edit data section; A third step of comparing the amount (N) of data to be recorded in the non-editing section with the data amount (L) of the edited data section and the storage capacity (M) of the memory; As a result of the comparison in the third step, if the data amount L of the edit data section is smaller than the data amount N to be recorded in the edit-free signal section and the storage capacity M of the memory, the data of the edit data section A fourth step of moving to the second step after recording a whole in the edit-free signal period; The data amount L of the edit data section is smaller than the data amount N to be recorded in the edit-free signal section and is larger than the storage capacity M of the memory, or the data amount L of the edit data section is If the amount of data N to be recorded in the non-editing section and the storage capacity M of the memory is larger than the amount of data N to be recorded in the edit-free signal section, the editing capacity is larger than the storage capacity M of the memory. A fifth step of moving only the data corresponding to the capacity of the memory among the data in the data section to the edit-free signal section and recording the data; The data amount L of the edit data section is smaller than the data amount N to be recorded in the edit-free signal section, is larger than the storage capacity M of the memory, or the data amount L of the edit data section. The amount of data (N) to be recorded in the non-editing section and the storage capacity (M) of the memory is larger than the amount of data (N) to be recorded in the non-editing section and the storage capacity (M) of the memory. And a sixth step of moving the second data to the second non-editing section and recording data corresponding to the amount of data to be recorded in the non-editing section of the edit data section. It is characterized by.

1 is a general configuration diagram of an erase rewritable optical disc system.

2 is a hardware configuration diagram for performing the editing method of the present invention.

3 is a detailed flowchart of an editing method according to an embodiment of the present invention;

<Description of the code | symbol about the principal part of drawing>

K: Disc 100: MPEG Encoder

110: CD-formatter 120: digital signal processing unit

130: amplification unit 140: optical pickup unit

150: system control unit 160: servo unit

170: CD-ROM decoder 180: MPEG decoder

210: memory

Hereinafter, with reference to the accompanying drawings will be described in detail the present invention.

2 shows a hardware configuration diagram for performing the editing method of the present invention. As shown in FIG. 2, the hardware for performing the editing method of the present invention further includes a memory 210 that stores information data reproduced for editing in the erasing rewritable optical disc system of FIG. 1 described above. do.

3 is a detailed flowchart of an editing method according to an embodiment of the present invention. The editing method of FIG. 3 is performed using the hardware of FIG.

When the stop key signal is provided from the outside during the normal play mode (S1, S2) (S3), the system controller 150 may refer to the sub data provided from the digital signal processor 120 to determine the erase start position on the optical disk K. After detection and storage in the internal memory (S4), the operation of the optical disc system is stopped (S5). Thereafter, when the section erase key signal is provided from the outside (S6), the system controller 150 causes the system to switch to the erase mode (S7).

The servo unit 160 controls the optical pickup unit 140 to start erasing from the current position. The optical pickup unit 140 sequentially erases data recorded on the optical disc K under the control of the servo unit 160.

When the section erasing key is provided again from the outside in the process of erasing as described above (S8), the system controller 150 detects the erasing end position, stores it in the internal memory (S9), and stops the erasing operation (S10). Thereafter, if a play key signal is provided (S11), the system controller 150 causes the system to operate in a play mode (S2). The servo unit 160 operates the optical pickup unit 140 in the regeneration mode under the control of the system controller 150. As the optical pickup unit 140 is operated in the playback mode, the data of the optical disc K is read and provided to the amplifier 130, the digital signal processor 120, the CD-ROM decoder 170, and the MPEG decoder 180 It is output to outside via). The output of the MPEG decoder 180 is then converted to analog and processed into an audio / video signal and provided to a monitor and a speaker (not shown) so that the user can view it.

When the erase key signal is supplied again during the operation in the reproduction mode as described above, the above-described process S6 and the like are performed.

When the data recorded on the optical disc is erased for each section through the above-described process, the optical disc K may be divided into data sections in which data is recorded and no signal sections in which data is not erased.

Therefore, when the edit key signal is provided (S12), the system controller 150 does not erase the data and the respective non-signal sections and data that are not erased based on the data for each erase start position and erase end position stored in the internal memory. Detects remaining data intervals.

Then, the first non-signal section of each no-signal section is set as the edit-free section (S13), and the first data section following the edit-no-signal section is set as the editing data section (S14) The amount of data N to be written into (S15), the amount of data L to be recorded in the edit data section (S16), and the capacity M of the memory 210 are detected (S17).

The data amount L of the edit data section is compared with the data amount N to be recorded in the edit-free signal section and the storage capacity M of the memory 210.

As a result of the comparison, there may be a case where the data amount L recorded in the edit data section is smaller than the data amount N to be recorded in the edit-free signal section and the storage capacity M of the memory 210 (S18, S19). The data amount L recorded in the edit data section may be smaller than the data amount N to be recorded in the edit-free signal section and larger than the storage capacity M of the memory 210 (S18, S19). .

In addition, the data amount L recorded in the edit data section is larger than the data amount N to be recorded in the edit-free signal section (S18), and may be smaller than the storage capacity M of the memory 210 (S20). The amount of data L recorded in the edit data section is larger than the data amount N to be recorded in the edit-free signal section and the storage capacity M of the memory 210, and the amount of data to be recorded in the edit-free signal section ( N) may be smaller than the storage capacity M of the memory 210 (S18, S20, S21).

The amount of data (L) recorded in the edit data section is larger than the data amount (N) to be recorded in the edit-free signal section and the storage capacity (M) of the memory 210, and the amount of data (N) to be recorded in the edit-free signal section (N). ) May be larger than the storage capacity M of the memory 210 (S18, S20, S21).

If the data amount L recorded in the edit data section is smaller than the data amount N to be recorded in the edit-free signal section and the storage capacity M of the memory 210 (S18, S19), the system control unit 150 After setting the start point of the edit data section stored in the internal memory as the playback start point (S22), and after setting the start position of the non-editing section as the recording start point (S23), the optical pickup unit 140 Control to jump to the playback start point (S24).

The servo unit 160 jumps the optical pickup unit 140 to the playback start point under the control of the system controller 150. The system controller 150 controls the system after the optical pickup unit 140 jumps to the playback start point. Is switched to the playback mode, and the reproduced data is stored in the memory 210 (S25).

The servo unit 160 operates the optical pickup unit 140 in the regeneration mode under the control of the system controller 150, and the optical pickup unit 140 sequentially reads data from the jump point to the amplifying unit 130. to provide. After the data provided to the amplifier 130 is amplified, it is provided to the CD-ROM decoder 170 via the digital signal processor 120, and the CD-ROM decoder 170 stores the data in the memory 210.

The system controller 150 continuously searches whether all data recorded from the playback start point to the playback end point have been reproduced and stored in the memory 210 by referring to the sub data provided from the digital signal processor 120 (S26). Once all have been stored, the system is controlled to stop playback (S27), and then the playback start point is converted to the erasing start point (S28), and the playback end point is converted to the erasing end point (S29).

Then, the system controller 150 causes the optical pickup unit 140 to jump to the recording start point (S30). The servo unit 160 jumps the optical pickup unit 140 to the recording start point under the control of the system control unit 160. The system servo unit 160 switches the system to the recording mode after the optical pickup unit 140 jumps to the recording point (S31). The data stored in the memory 210 under the control of the system controller 150 is recorded by the optical pickup unit 140 via the CD-formatter 110, the digital signal processor 120, and the amplifier 130. Will be recorded sequentially.

After all the data stored in the memory 210 has been recorded on the optical disk K (S32), the system controller 150 stores the recording stop position and stops recording (S33, S34).

Thereafter, the system controller 150 controls the system to perform the erasing operation from the erasing start point to the erasing end point (S35, S36, and S37). Accordingly, the optical pickup unit 140 performs the erase from the erase start point on the disc to the erase end point (S38).

After all of the data of the first data section set as the edit data section is recorded in the non-editing section, the data of the first data section is erased.

Therefore, after erasing is completed, the system controller 150 sets the starting point of the second data section to the start point of the second data section from the recording stop position stored in step S33 on the disk (S39). And the end point is set as the edit data section (S40).

The system controller 150 detects the data amount N to be recorded in the edit-free signal section and the data amount L of the edited data section (S15 and S16), and then proceeds to S17 and below.

On the other hand, the data amount L recorded in the edit data section is smaller than the data amount N to be recorded in the edit-free signal section, is larger than the storage capacity M of the memory 210, or is recorded in the edit data section. The amount of data L to be recorded is larger than the amount of data N to be recorded in the no-editing section and the storage capacity M of the memory 210, and the amount of data N to be recorded in the no-editing section is memory 210. (S18, S20, S21) will be described when it is larger than the storage capacity (M) (S18, S19).

The system controller 150 sets the start point of the edit data section as the playback start point (S41), and sets the start position of the edit-free signal section as the recording start point (S42). Thereafter, the system controller 150 controls the optical pickup unit 140 to jump to the reproduction start point (S43). The servo unit 160 jumps the optical pickup unit 140 to the playback start point under the control of the system controller 150. The system controller 150 controls the system after the optical pickup unit 140 jumps to the playback start point. Is switched to the regeneration mode, and the reproduced data is stored in the memory 210 (S44).

The servo unit 160 operates the optical pickup unit 140 in the regeneration mode under the control of the system controller 150, and the optical pickup unit 140 sequentially reads data from the jump point to the amplifying unit 130. to provide. After the data provided to the amplifier 130 is amplified, it is provided to the CD-ROM decoder 170 via the digital signal processor 120, and the CD-ROM decoder 170 stores the data in the memory 210.

The system controller 150 refers to the sub data provided from the digital signal processor 120 and stores the data at the memory 210 as much as the capacity M of the memory 210 (S45). After controlling the system to stop playback (S46) (S47), the playback start point is converted to the erasing start point (S48), and the position at which playback is stopped is set as the erasing end point (S49).

Thereafter, the system controller 150 causes the optical pickup unit 140 to jump to the recording start point (S50). The servo unit 160 jumps the optical pickup unit 140 to the recording start point under the control of the system control unit 160. The system servo unit 160 switches the system to the recording mode after the optical pickup unit 140 jumps to the recording point (S51). The data stored in the memory 210 under the control of the system controller 150 is recorded by the optical pickup unit 140 via the CD-formatter 110, the digital signal processor 120, and the amplifier 130. Will be recorded sequentially.

After all the data stored in the memory 210 is recorded on the optical disk K (S52), the system controller 150 stops recording (S53) and then controls the system so that the erase proceeds from the erase start point to the erase end point. (S54, S55, S56, S57). Accordingly, the optical pickup unit 140 performs erasing from the erasing start point on the disk to the erasing end point. When erasing is completed, the system controller 150 sets the edit stop signal section from the recording stop position set in step S46 to the edit stop signal section (S58), and edits the data from the playback stop position to the start point of the next no signal section. Set to the interval (S59).

The system controller 150 detects the data amount N to be recorded in the edit-free signal section and the data amount L of the edited data section, and then proceeds to step S17 and subsequent steps.

Further, when the data amount L recorded in the edit data section is larger than the data amount N to be recorded in the edit-free signal section (S18) and smaller than the storage capacity M of the memory 210 (S20), The amount of data (L) recorded in the edit data section is larger than the data amount (N) to be recorded in the edit-free signal section and the storage capacity (M) of the memory 210, and the amount of data (N) to be recorded in the edit-free signal section (N). ) Is smaller than the storage capacity M of the memory 210 (S18, S20, S21) as follows.

The system controller 150 sets the start point of the edit data section as the playback start point (S60), and sets the start position of the edit-free signal section as the recording start point (S61). Thereafter, the system controller 150 controls the optical pickup unit 140 to jump to the reproduction start point (S62). The servo unit 160 jumps the optical pickup unit 140 to the playback start point under the control of the system controller 150. The system controller 150 controls the system after the optical pickup unit 140 jumps to the playback start point. Is switched to the playback mode, and the reproduced data is stored in the memory 210 (S63).

The servo unit 160 operates the optical pickup unit 140 in the regeneration mode under the control of the system controller 150, and the optical pickup unit 140 sequentially reads data from the jump point to the amplifying unit 130. to provide. After the data provided to the amplifier 130 is amplified, it is provided to the CD-ROM decoder 170 via the digital signal processor 120, and the CD-ROM decoder 170 stores the data in the memory 210.

The system controller 150 refers to the sub data provided from the digital signal processor 120, and when the amount of data corresponding to the non-editing section is stored in the memory 210 (S64), once the playback has stored the stop position, (S65) After the system is controlled to stop playback (S66), the playback start point is converted to the erasing start point (S67), and the position at which playback is stopped is set as the erasing end point (S68).

Thereafter, the system controller 150 causes the optical pickup unit 140 to jump to the recording start point (S69). The servo unit 160 jumps the optical pickup unit 140 to the recording start point under the control of the system control unit 160. The system servo unit 160 switches the system to the recording mode after the optical pickup unit 140 jumps to the recording point (S70). The data stored in the memory 210 under the control of the system controller 150 is recorded by the optical pickup unit 140 via the CD-formatter 110, the digital signal processor 120, and the amplifier 130. Will be recorded sequentially.

After all the data stored in the memory 210 has been recorded on the optical disk K (S71), the system controller 150 stops recording (S72) and then controls the system so that the erase proceeds from the erase start point to the erase end point. (S73, S74, S75, S76). Accordingly, the optical pickup unit 140 performs erasing from the erasing start point on the disk to the erasing end point. When the erasing is completed, the system controller 150 sets the edit stop signal section from the recording stop position set in step S72 to the non-editing section (S77), and edits the data from the playback stop position to the start point of the next non-signal section. Set to the interval (S78).

The system controller 150 detects the data amount N to be recorded in the edit-free signal section and the data amount L of the edited data section, and then proceeds to step S17 and subsequent steps.

As described above, according to the present invention, when data for an unnecessary part of the information recorded on the disk is erased for each section and then the edit key is pressed, the remaining information data is automatically moved to the front part and recorded sequentially, which is very convenient.

Claims (1)

A method of editing using an erasable rewritable optical disc system having a memory for recording data on an optical disc, erasing or playing back the recorded data, and storing the reproduced data: After erasing information on an unwanted portion of data of the optical disc, first information storing section information on non-signal sections without data being erased and section information about data sections remaining without data being erased; step; A second step of setting, after the first step, the first non-signal section among the no-signal sections as the edit-no signal section, and setting the data section following the set no-signal section as the edit data section; A third step of comparing the amount (N) of data to be recorded in the non-editing section with the data amount (L) of the edited data section and the storage capacity (M) of the memory; As a result of the comparison in the third step, if the data amount L of the edit data section is smaller than the data amount N to be recorded in the edit-free signal section and the storage capacity M of the memory, the data of the edit data section A fourth step of moving to the second step after recording a whole in the edit-free signal period; The data amount L of the edit data section is smaller than the data amount N to be recorded in the edit-free signal section and is larger than the storage capacity M of the memory, or the data amount L of the edit data section is The amount N of data to be recorded in the non-editing section and the storage capacity M of the memory 210 are larger, and the amount N of data to be recorded in the non-editing section is the storage capacity M of the memory 210. If larger, the fifth step of moving only the data corresponding to the capacity of the memory among the data of the edited data section to the edited non-signal section and proceeding to the second step; The data amount L of the edit data section is smaller than the data amount N to be recorded in the edit-free signal section, is larger than the storage capacity M of the memory, or the data amount L of the edit data section. The amount of data (N) to be recorded in the non-editing section and the storage capacity (M) of the memory is larger than the amount of data (N) to be recorded in the non-editing section and the storage capacity (M) of the memory. And a sixth step of moving to the second step after recording the data corresponding to the amount of data to be recorded in the non-editing section among the data of the edited data section and recording the data in the no-signing section. How to edit.